Thymophylla pringlei

Thymophylla pringlei Rydberg, sp. nov
A perennial, suffruticose at the base; stems 1-2 dm. high, diffusely branched, viscidpuberulent ; leaves opposite, puberulent, about 2 cm. long, pinnatifid into 5-9 filiform, spinulosetipped segments; peduncles slender, 2-5 cm. long; involucre campanulate, 4 mm. high, 3-4 mm. broad, finely pruinose-puberulent, naked or with 1-3 minute, subulate accessory bracts; principal bracts in two series, united high up, the inner with triangular tips and 1-3 glands, the outer linear, with 3-5 glands and the free margins decurrent; ligules yellow, 4 mm. long, 1.5-2 mm. wide; disk-corollas 3 mm. long; achenes 3 mm. long, glabrous; pappus double; inner 5 squamellae 3 mm. long, awn-tipped, the outer 5 only 1 mm. long, spatulate, obtuse.
Type collected on calcareous soils, hills near Chihuahua, 1886, Pringle 1022 (herb. Columbia Univ.).
Distribution: Arizona and Chihuahua.